Answered: Question 12 A solid steel sphere of… | bartleby

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Question 11
After some time, you pour 0.5 kg of milk, whose initial temperature was 5°C. What will
be the final equilibrium temperature of this system? Let:
1.5 kg of coffee, originally at 90°C, is placed into a .3 kg aluminum cup.
J
Ccoffee = 4186
kg K
J
CAI = 500
kg K
J
CMilk = 3000
kg K
Question 12 A solid steel sphere of radius 50
acts as a perfect radiator, calculate the amount of heat it will radiate after 1 min.
cm is heated to 3000 K. If the sphere

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HW 4.1: Accelerating Systems (pg. 2 of 2) Q2 Train Example: A train engine pulls a train with three cars. Each car has the mass shown. Suppose that the cars are connected by ropes with the tensions indicated in the diagram. The engine accelerates at a rate of 2 m/s². Assume that the cars travel on frictionless bearings. 3000 kg 2000 kg 1000 kg (a) On the dots below, draw free-body diagrams showing the forces acting on each of the three train cars. For each diagram, write an equation that relates the forces in the diagram to acceleration. Forces on the 3000 kg car Forces on the 2000 kg car Forces on the 1000 kg car 10-9 (b) On the squares below, draw external force diagrams showing only the external forces acting on each of the systems indicated. Please omit forces that balance. For each diagram, write an equation that relates the forces in the diagram to acceleration. Forces on the 2000-1000 system Forces on 3000-2000-1000 system Forces on the 3000-2000 system (c) Use the equations you…
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